It's a good thing you thought of this and had to make emphasis on it because, a lot of persons might not know the difference between Bitcoin and Bitcoin cash. They almost assume in one instant based on any that they are approached first with to be Bitcoin.
It is not only about Bitcoin and Bitcoin Cash. I thought the warning has its expansion to abundant forks or clones of bitcoin are available on the market. Being scammed by though Bitcoin forks are bitcoin is stupid but some people were not scammed like that. They did knew the coin they invested in are not bitcoin but they believe the shit forks they invested in will have high value, a few dollars, a few hundred of dollar.